1244135225 has 24 divisors (see below), whose sum is σ = 1635386400. Its totient is φ = 935665920.

The previous prime is 1244135203. The next prime is 1244135273. The reversal of 1244135225 is 5225314421.

It is not a de Polignac number, because 1244135225 - 2⁶ = 1244135161 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 721214 + ... + 722936.

It is an arithmetic number, because the mean of its divisors is an integer number (68141100).

Almost surely, 2^1244135225 is an apocalyptic number.

It is an amenable number.

1244135225 is a deficient number, since it is larger than the sum of its proper divisors (391251175).

1244135225 is a wasteful number, since it uses less digits than its factorization.

1244135225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449 (or 3444 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 1244135225 is about 35272.3011015726. The cubic root of 1244135225 is about 1075.5300000572.

Adding to 1244135225 its reverse (5225314421), we get a palindrome (6469449646).

The spelling of 1244135225 in words is "one billion, two hundred forty-four million, one hundred thirty-five thousand, two hundred twenty-five".